Chart of the world: containing the lines of oceanic mail steam communication and overland routes, the great aerial and submarine telegraphs, and the principal tracks of sailing vessels showing the direction and mean velocity of oceanic currents and important deep-sea soundings with 27 additional charts and plans showing the general currents of air, the cotidal lines and the lines of equal magnetic variation so der wichtigeren segelschiffsswege der bodenbeschaffenheit der see-strömungen und neuer tiefsee-messungen mit 27 nebenkarten zur darsellung der hauptwindrichtungen und der linien gleicher magneticher missweisung
Berghaus Hermann | J. Perthes | 1875